Sheet securing means



March 7, 1939.

.1. KoMoRoUs 2,149,918

SHEET SECURING MEANS Filed Aug. 16, 1937 Patented Mar. 7, 1939 UNITED STATES PATENT OFFICE SHEET SECURING MEANS Joseph Komorous, Riverside,

Ill., assignor to Parisian Novelty Company, Chicago, Ill., a cor- My invention relates tomeans for securing together adjacent sheet edges, as for example, and more particularly, the adjacent edges of sheets, such as for example of celluloid, bent into cylindrical shape and bearing suitable indicia to form cylinder tuning dials for radio receiving apparatus.

One of my objects is toI provide a novel, simple and inexpensive construction of sheet-edge securing means.

Another object is to provide a construction of securing means which may be easily applied to operative position and the structure reduced to cylindrical finished form by the purchaser preferably with the securing means preliminarily secured to one edge of the sheet at the factory, whereby the sheets may be shipped in flat condition with the manifest advantage.

Another object is to provide a securing means whereby the sheet edges may be secured together in edgewise opposed relation.

Another object is to provide a construction of securing means for Celluloid sheets whereby the procedure of heating the sheet by contact with heated forms to soften it required when securing means as hitherto employed are used in the forming of cylinders of small diameters, are rendered unnecessary.

Another object is to provide a construction of securing means which will be relatively thin, thereby avoiding a bulky joint between the sheet edges, preferably with the sheet edges in edgewise opposed relation, a feature which is of particular advantage in the case of a radio tuning cylindrical dial; and other objects as will be manifest from the following description.

Referring to the accompanying drawing:

Figure 1 is a view in side elevation of a cylindrical tuning disk for radio receiving apparatus and embodying my invention.

Figure 2 is a similar fragmentary enlarged View of the dial showing certain portions broken away; and

Figure 3, a fragmentary sectional view taken at the line 3 on Fig. 2 and viewed in the direction 1937, Serial N0. 159,446

used as a tuning dial in a radio receiving apparatus.

The sheet-securing means shown comprises a strip 5 of metal provided with two series of tongues 6 and l, respectively, at a face thereof 5 with the bases of the tongues located substantially coincident with the median line of the strip. The tongues 6 and l extend toward the opposite longitudinal edges, respectively, of thev strip to afford means whereby the adjacent edges 8 and 9 of the sheet 4, which are positioned to extend between the tongues and the body of the strip, may be securely clamped in position to the strip,

Preferably, and as shown, the tongues 6 and 1 are formed of the metal forming the strip, by partially severing the metal of the strip to form the tongues and then bending the partially severed portions into the shape shown to cause the tongues to extend in a plane slightly forwardly offset from the plane of the body of the strip 5 and present shoulder portions l0 at their bases whereby the sheet edges 8 and 9 may be entered between the tongues 6 and l and the body of the strip and readily accurately positioned relative to each other and to the strip, by seating them against the shoulders I0. To insure against the accidental displacement of the sheet edges, the tongues, after application of the sheet edges to the strip as stated, may be forcibly bent against the sheet by using any suitable means for this purpose.

As will be understood, the operation of assembling the sheet and securing means is a very simple one and can be eiected without requiring a factory operation or machinery especially con- 35 structed for this purpose. This is of particular advantage as it permits of the sheets being shipped in flat condition, either with the securing strips secured to one edge only or wholly detached from the sheets, and the assembling operation performed or completed, as the case may be, by the purchaser.

Another advantage of the construction is that the edges of the sheet at the joint are in edgewise opposed relation and this feature, particularly in combination with securing means of the construction shown, insures the inexpensive production of a substantially perfect cylinder without undue thickness of structure at the joint.

Furthermore, by providing a securing means as described, celluloid sheets may be formed into cylinders of all desired diameters and their adjacent edges secured together without requiring the softening of the sheets prior to such operations.

While I have illustrated and described a particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto as the structure shown may be variously modified and altered and the invention embodied in other forms of structure and in structures provided for other uses than that above described, without departing from the spirit of the invention` What I claim as new, and desire to secure by Letters Patent, is:

l. Securing means for sheet edges comprisin a strip member, series of tongues at a face there` of with the bases of said tongues in substantial alinement lengthwise of thestrip member, one of,

said series of tongues extending outwardly toward one lateral edge of said strip member and the other of said series of tongues extendinglz'outf wardly toward the opposite edge of saidY stripv member.

2'; In combination, edges Vof Va sheet to be se-V cured together to forma cylinder and means forV securing said edges together, comprising astrip member and series` of tongues on said strip member extending in opposite. directions toward the adjacent lateral edges, respectively, of the strip member, one edge of said sheet being clamped between saidstrip member and the adjacent ones of said tongues, and the other edge of said sheet being clamped between said strip member andthe others of said tongues, the tongues projecting in each direction interspersed withtongues projecting in the opposite direction. Y

3.. Securing means for sheet edges,.comprising: a strip member to extend, continuously alongV the length ofthe edges to be connected and to underlie both of said edgesat the joint therebetween, a plurality of tongues struck from the material of the strip with their bases in substantial alignment midway of thewidth ofthe strip, a plurality of said tongues projecting in each direction from their bases, with oppositely directed tongues interspersed.

4. Securing means for sheet edges; comprising: a strip of metal to underlie and extend continuously along the edges, a plurality of tongues struck from the metal of the strip, the bases of said tongues projecting at substantially from the material of the strip and in alignment thereon, the bodies of said tongues bent alternately in opposite directions from said bases into substantial parallelism with the surface of said strip and spacedtherefrom a distance substantially equalvto the thickness of said edges, whereby said edgesmaygenter'under said bodies to abut said vbases and be'clamped by forcible bending of said tongues into contact with the surface of the margins Vof, the sheet;

tween said, e'dges, a plurality of closely spzatcedxge tongues struckl from the metal of the strip andy projecting alternately in opposite directions from.

their bases, saidbases in alignment andextendingsubstantially perpendicular from the surface of the strip a distance substantially equal to the. thickness of the sheet to provide shoulders against which the adjacent edges of the sheet may abut whereby to determinevthe` alignment `of said edges in parallelism to preserve anaccurate cylindricalformior the-cylinder, the bodiesroiy said tongues overlying and forcibly pressedinta clamping contact with the surface of saidsheet to preserve the cylindrical form of the sheet.v

JOSEPH. KOMOROUS.' 

